In the deployment I did kill -s USR2 `cat unicorn_pid` to gracefully
restart unicorn. But I noticed that unicorn workers were partially
restarted when using USR2.
The following is how I did test:
start unicorn in production environment:
the action has the following code:
def index
logger.info "-----------------------------------------fooo bar ---------"
logger.info "-----------------------------------fooo bar ---------"
end
then changed the code to:
def index
logger.info "--####---------------------------------fooo bar ---------"
logger.info "-----------------------------------fooo bar ---------"
end
and run kill -s USR2 `cat unicorn_pid`
and then tail the production.log (after several minutes)
Started GET "/" for 192.168.21.1 at Sat May 07 04:13:31 -0700 2011
Processing by NewHomeController#index as HTML
-----------------------------------fooo bar ---------
-----------------------------------fooo bar ---------
Rendered new_home/index.html.erb within layouts/new_home (15.5ms)
Completed 200 OK in 16ms (Views: 16.2ms)
Started GET "/" for 192.168.21.1 at Sat May 07 04:13:31 -0700 2011
Processing by NewHomeController#index as HTML
--####---------------------------------fooo bar ---------
-----------------------------------fooo bar ---------
Rendered new_home/index.html.erb within layouts/new_home (28.1ms)
Completed 200 OK in 29ms (Views: 28.9ms)
Started GET "/" for 192.168.21.1 at Sat May 07 04:13:31 -0700 2011
Processing by NewHomeController#index as HTML
-----------------------------------fooo bar ---------
-----------------------------------fooo bar ---------
Rendered new_home/index.html.erb within layouts/new_home (17.5ms)
Completed 200 OK in 20ms (Views: 18.4ms)
Started GET "/" for 192.168.21.1 at Sat May 07 04:13:37 -0700 2011
Processing by NewHomeController#index as HTML
--####---------------------------------fooo bar ---------
-----------------------------------fooo bar ---------
Rendered new_home/index.html.erb within layouts/new_home (13.5ms)
So it seems that unicorn was just partially restarted.
Best Regards,
Stone
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